[18] Pathology of Myocardial Infarction

Question 1

Most Common Blood Vessel Infarcted

Answer 1

Left Anterior Descending Artery

Question 2

What causes Contraction Band Necrosis during Reperfusion Injury

Answer 2

Hyperfusion of Ca2+ ions cause necrosis

Question 3

What causes Cardiogenic Shock during MI

Answer 3

> 40% loss of left ventricular mass

Question 4

Can you have Hypoxia without Ischemia?

Answer 4

Yes, if the oxygen content of blood decreases as a result of anemia

Question 5

Thrombosis usually occurs in this coronary blood vessel

Answer 5

Left Anterior Descending

50%

Question 6

Thrombosis never occurs in this coronary blood vessel

Answer 6

Intramyocardial Branches

Question 7

Myocyte injury is irreversible after how many minutes?

Answer 7

30-60 minutes of ischemia

Question 8

[Gross and Microscopic Heart Changes]

4 Hours post MI

Answer 8

No changes

Question 9

[Gross and Microscopic Heart Changes]

4-24 Hours Post MI

Answer 9

Coagulation Necrosis

Edema

Question 10

[Gross and Microscopic Heart Changes]

3-7 Days

Answer 10

Peak of damage

Question 11

[Gross and Microscopic Heart Changes]

1-3 Weeks

Answer 11

Beginning of healing

Question 12

[Gross and Microscopic Heart Changes]

3-6 Weeks

Answer 12

Fibrosis